#!/usr/bin/env node
import { readFileSync, writeFileSync } from "node:fs";
import { parseArgs } from "node:util";

const { values } = parseArgs({
  options: {
    "private-key-file": { type: "string" },
    "client-email": { type: "string" },
    output: { type: "string", default: "cred.json" },
  },
});

if (!values["private-key-file"] || !values["client-email"]) {
  console.error("Usage: make_cred.mjs --private-key-file FILE --client-email EMAIL [--output FILE]");
  process.exit(1);
}

const privateKey = readFileSync(values["private-key-file"], "utf8");
const clientEmail = values["client-email"];

const cred = {
  type: "service_account",
  project_id: clientEmail.split("@")[1].split(".")[0],
  private_key: privateKey,
  client_email: clientEmail,
  token_uri: "https://oauth2.googleapis.com/token",
};

writeFileSync(values.output, JSON.stringify(cred, null, 2) + "\n");